Can 3D glasses get any less fashionable? Of course they can! And here's some proof. Today, SensoMotoric Instruments (SMI) teased its new Eye-Tracking 3D Glasses, which use a pair of small cameras mounted to the eyeglass rim to keep tabs on your gaze, adjusting perspective as you look about a scene. The rig uses ActiveEye technology from Volfoni, and can detect eye distance as well in order to provide a 3D-viewing experience that's optimized for each user. Adding some optional hardware, including optical targets (as seen in the video after the break), can enable 6D head tacking support, for an even more immersive experience. Naturally, the solution is a bit cumbersome, and while pricing hasn't been announced, we don't expect it to come cheap -- it's definitely something you'd be more likely to see implemented as part of a virtual reality system, rather than a device you'd use at home. So, while you may never see such a product in the flesh, you can still get an idea of how it'll work in the video after the break.